When asked about his interest in the game by a prosecutor, Breivik angrily dismissed the idea that playing World of Warcraft had any connection to his attacks, according to media reports.
"It is not relevant to this case whatsoever," Breivik said, getting so upset that he threatened to turn off his microphone, according to Norwegian newspaper Verdens Gang.
Its pretty sad when the murder has more sense than the prosecution or the media!

In all seriousness though, this can be taken as a really interesting commentary on Norwegian society. Norwegian society is one of the most, if not the most, secularized societies in the world. In absence of a cultural notion of sin, all immoral acts tend to be treated as the symptoms of some disease that can be cured. Accordingly the Norwegian Justice System and penal system is set up not so much to punish immoral behavior, but to reform and "cure" the convicted. This is why their prisons are so plush and their sentencing so light. Breivik, for the murder of 77 people, is facing a maximum sentence of 21 years in prison.
With all that in mind it is really interesting to watch the Norwegians attempt to figure out what to do with Breivik. They are desperately looking for something other than him that they can blame his actions on. Because at the end of the day, if they can't find something else to blame those 77 murders on, they'll have to admit to themselves that there actually is such a thing as evil and it can't be treated medically or psychologically.
Its almost comical, in a tragic sense. I read this story and see a country desperately trying to cling to their worldview which denies the existence of evil despite being faced with tremendous evil. So they see that Breivik played video games and latch onto that. "Did the video games break you?" they ask, wanting him to say yes. This makes Breivik angry because he committed those murders to carry out his own twisted sense of justice. He wants to make a point, which he cannot if the justice system treats him like a patient instead of a competent, albeit evil, adult.
Sorry that rambled on, I just thought this story is an interesting commentary on their society.